Bobbin support for weft replenishing looms



Oct, 6, 1931. PJBERGSTROM I 2 BOBBIN SUPPORT FOR WEFT REPLENISHING LOOMS Filed April 10, 1930 jM/E/v TOR [A FPL. B55555 TED/7 A 7709M: Y5

Patented Oct. '6, 1931 UNITED STATES PATENT OFFICE CARL PHILIP BERGSTROM, 0F PROVIDENCE, BHODE ISLAND, ASSIGNOR TO CRDMP'ION & KNOWLES LOOM WOBKS OF WORCESTER, MASSACHUSETTS, ACORPORATION OF 1 .MASSACHUSETTS BOBBIN surronr FOR wnr'r nnrrnivisnme LOOMS Application filed April 10,

This invention relates to improvements in bobbin supports for weft replenishing looms and it is the general object of the invention to provide a support which will act to position a bobbin quickly in proper locationffor transfer.

In multicolor wef; replenishing looms the bobbins are discharged from one or another of several stacks to fall on bobbin supports. The called bobbin rolls down the supports to a common transfer position and is then insorted into the depleted shuttle. If thebobbin travels from an on side stack or cell it will occasionally acquire sufficient momentum when rolling down the adjacent supports to roll upwardly on the opposite supports before finally coming to rest. It is an important objectof my present invention to provide a bobbin support with a distinct shoulder sufficiently pronounced to engage the bobbin and arrest excess or overriding movement thereof. I I

It is a further objectof my; invention to provide pair of bobbin supportseach to have aguiding surface which terminates at an abrupt shoulder, the supportsbeing pro vided wi h lower bobbin supporting surfaces beyond the shoulder to hold the bobbin tip in transfer position. By such an arrangement a bobbin when rolling over the shoulder will be given an extra downward motion by gravity which is calculatedto throw it against the other shoulder. This action flakes place irrespective of the direction 1n which the bobbin approaches the final transfer position.

With these and other objects in'view which will appear as the description proceeds, my invention resides the combination and arrangement of parts hereinafter described and se' forth in the claims.

In the accompanying drawings, wherein a convenient embodiment of myinvention is set forth,

Fig. 1 isa verticalsection'through-the lower part of a multicolor magazine showing my 'mproved' bobbin supportsin normal bobbin supporting relation,

Fig. 2is atop plan view on an enlarged,

1930.- Serial 'No. 443,190.

13 is suitably pivoted onthe magazine frame and. is actuated in wellknown. manner by,

devices notherein shownto move down when transfer is to take place. i

The magazine employs in its construction tie rods two of which are shown at 14 in Fig.

1. Each of these tie rods is provided with a. holder 15 rendered angularly andlongitudinally adjustable on the corresponding rod by means of a screw 16; Front and back bobbin butt supports 1' 7 and 18 may be provided to operate in the usual manner and when formed as illustrated herein form nopartiof my present invention other than to cooperate with my improved supports to position a bobbin.

In carrying my invention into efi'ect I pro vide as illustrated herein two supports for the tip of the bobbin and as each support and its correspondingholder is the same I will describe but one. Each holder is provided with a cap held in position by a bolt 31 secured to the body of the holder 15. The support scale taken in the direction of arr-0W2, Fig.

comprises a closely wound coil spring 82 held for angular and longitudinal adjustment between thecap and'its holder and inclined downwardly and toward transfer position as shown in Fig. 1. The upper part of the support has relatively large coils 33 of the same diameter which form a practically smooth gulilde surface along which the bobbin may r0 c The lower end of the support is "formed by body having a substantially cylindrical surface separated from the adjacent large coil by a shoulder 35. This shoulder is formed by the wire of which the support is wound and therefore is sufliciently rounded so as to avoid damaging the bobbin. Because of the fact that the support is made of wire no additional precautions are necessary to provide a round edge for the shoulder.

As suggested in Figs. 2 and 3, the lower end of the support may be covered as by rubber or lacquer or similar material. vVhen this coating is dry it fills the spaces between adjacent coils of the spring and thereby prevents the thread W and the bobbin B from being pinched or improperly held by the bobbin support.

In practice, the supports are placed sub stantially as shown in Fig. l, and as a bobbin moves toward transfer position the tip will slide down the large coils and arrive at the shoulder. Assuming that the bobbin is coming from the rear or right hand stack as shown in Fig. 1, the bobbin moves to the left and immediately after passing the shoulder 35 of the rear support will be temporarily unsupported and will therefore move downwardly by gravity, being directed toward the opposite shoulder 35 of the other or front bobbin support. In this way the shoulder on the support opposite that down which the bobbin first rolls is effective to engage the bobbin and bring it to proper transfer position quicker than is possible in existing forms of supports.

From the foregoing it will be seen that I have provided a simple form of bobbin support having a shoulder formed so as not to injure the bobbin but effective to arrest excess motion on the part of the bobbin and assist in positioning the latter in proper transfer position with a minimum loss of time. Furthermore, the first shoulder encountered by a bobbin moving toward transfer position enables the bobbin to alter its course and be directed toward the other shoulder.

Having thus described my invent-ion it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a weft replenishing loom wherein a bobbin moves by gravity to transfer position, a pair of inclined bobbin supports to coact and assist in holding a bobbin in transfer position, a shoulder formed on the upper portion as an integral part of one of said supports to engage a bobbin rolling down the other support and prevent the bobbin from moving by reason of its momentum substantially beyond proper transfer position, said supports being resilient throughout their length.

2. In a weft replenishing loom wherein a bobbin moves by gravity to transfer position, a pair of inclined yielding bobbin supports, a shoulder formed on the bobbin engaging portion of each of said supports, each shoulder being positioned to engage a bobbin rolling down the opposite support to prevent the bobbin from moving substantially beyond proper transfer position, said supports yielding at any point throughout their length.

3. In a weft replenishing loom wherein a bobbin moves by gravity to transfer position, a pair of inclined bobbin supports along either of which a bobbin may roll toward transfer position, each support having a substantially smooth upper guiding surface along which a bobbin may roll, and an abrupt shoulder formed on the lower portion of each guiding surface, each support having a bobbin positioning surface extending beyond the shoulder to assist in holding the bobbin in' proper transfer position, each shoulder being placed to engage and arrest excess motion of the bobbin rolling down the opposite support, the surfaces forming an integral part of the support.

4. In a weft replenishing loom wherein a bobbin moves by gravity to transfer position, a. pair of inclined bobbin supports along either of which a bobbin may roll toward transfer position, each support being substantially cylindrical. and resilient throughout its entire length and having the end adapted. to hold the bobbin in transfer position of smaller diameter than the remainder of the support but formed integral with the sup port; and a bobbin engaging shoulder adia cent the end of small diameter to engage a bobbin and arrest excess motion thereof.

5. In a weft replenishing loom wherein a bobbin moves by gravity to transfer posi tion, a pair of inclined bobbin supports along either of which a bobbin may roll toward transfer nosition, each support being formed. of a coil spring having coils of two different diameters. the greater part of the len th of the support having coils of relatively large diameter and the bobbin nositioning end. having coils of smaller diameter. and a shoulder separating the coils of, different diameters to engage and arrest excess motion of a bobbin moving to transfer position.

6. n a weft renlenisbine loom wherein a bobbin moves bv ravitv to t ansfer position :1 pair of bobbin su ports to emm ore onnosite sides of a bobbin when the latter is in transfer position. and. a pair of shoulders one or each support and formed as an i teqr l art of on cb snnoort. the sup orts be inc: inclined and a bobbin when rolling down one support being temporarily unsupported when leaving the first shoulder to be engaged and thereby being directed toward theother shoulder to have the momentum thereof arrested by said secondshoulder, said supports being resilient throughouttheir length.

7 A bobbin support for a weft replenishing loomcomprising a spring coiled on itself throughout the lengthof the support, said spring having two sections of coils of-diiferent diameters, the section of larger diameter presenting a guiding surface along which a bob bin may roll toward transfer position, and a shoulder between the sections to engage and arrest excess motion of a bobbin movingtoward transfer position.

8. A bobbin support for a weft replenishing loom comprising two substantially parallel integral surfaces along which a bobbin may roll toward transfer position, and an abrupt shoulder separating said surfaces positioned to engage and arrest excess motion 7 of a bobbinmoving toward transfer position.

9. A bobbin support for a weft replenishing loomcomprising a body formed of inherently resilient material throughout its length, said supportbeing formed of two cy lindrical integral portions of different diameters and a shoulder located between the por- I tions ofdiiferent diameters positioned to engage. and arrest excess'movement of a bobbin moving toward transfer position.

10. A bobbin support formed of inherently resilient material and having'a relatively long bobbin guiding surface and having a relatively short bobbin positioning surface formed as which said adjacent coil is wound exposed to present a smooth shoulder to engage and absorb the momentum of a bobbin moving toward transfer position.

12. A coiled spring bobbin support having integral parts of two different diameters separated by an abrupt shoulder, each part being inherently resilient. v

In testimony whereof I have hereunto aflixed my signature.

CARL PHILIP BERGSTROM. 

